/**
 * Copyright (c) 2017 Baidu, Inc. All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


'use strict';

const BaseCard = require('./BaseCard');

/**
 * @class ImageCard 全图卡片
 * @extends {BaseCard}
 */
class ImageCard extends BaseCard {

    /**
     * 构造函数
     **/
    constructor () {
        super();
        this.data.type = 'image';
    }

    /**
     * 添加一个图片项
     *
     * @example
     * this.addItem('http://image.src', 'http://thumbnail.src');
     * this.addItem('http://image.src');
     *
     * @param {string} src 图片地址
     * @param {string} thumbnail 图片缩率图地址. 可选
     * @return {ImageCard} 返回自己
     * @public
     **/
    addItem(src, thumbnail = ''){
        if (!src) {
            return this; 
        }

        this.data.list = this.data.list || [];

        let item = {src: src};
        if (thumbnail) {
            item.thumbnail = thumbnail;
        }

        this.data.list.push(item);
        return this;
    }
}

module.exports = ImageCard;
